[QuadList] Rebuilding RCA TR-600s

[Dale Lamm]

[snip]
Thanks for the insight.especially about the reel motors.  I'm not sure it is 
the solenoid.but it sounds like that is what is buzzing.replacing the 
solenoid seems pretty straight-forward, if that is what it is.  It is the 
solenoid that appears to actuate the reel brakes.
[end]

Never put a greenie to a TR-600, but certainly on a few other quads. IIRC, 
the solenoid releases (not engages) the reel brakes. If a "buzzing" solenoid 
is not pulling in completely, the brake band could be dragging on a reel, 
causing the capstan servo to fight with it. When you step on the little 
footswitch to release the brakes (done while threading tape), do the reels 
move freely?